Improvement in devices for supporting pipe-cores



Improvement in Devices for Supporting Pipe Cores.

121,96], v Patentedflec. 19,187];

' WITNESSES.

UNITED STATES PATENT Orrron.

CHARLES J. O. PETERSEN, OF PORT CHESTER, NEW YORK.

Specification forming part of Letters Patent No. 121,961, dated December 19, 1871.

To all whom it may concern:

Be it known that I, CHARLES J. O. Pnrna SEN, of Port Chester, in the county of Westchester and State of New York, have invented certain Improvements in Making Gast lron Pipes, of which the following is aspecification:

This invention consists in making cast-iron pipes by means of a compress and a rest for the same. By this combination an equal pressure can be given with great accuracy, to counteract the pressure of the molten iron, whereby small pipes can be made of more uniform thickness in iron, straighter, and without chaplets being cast in; and pipes of larger diameter, which are made without chaplets, but where the cores are not sufficiently strong to stand the pressure of the iron without being sprung to some extent, can be made straighter and of more even thickness of iron.

Figure 1 is a side elevation embodying my invention. Fig. 2 is a plan of the same. Fig. 3 is an elevation, showing that end of a flask in which two small pipes are cast in one flask. Fig. 1 is an elevation, showing that end of a flask at the right hand in Fig. 1, in which one pipe is cast.

A is the cope,B the nowel, andO the handles of a flask. They should be about five inches long, and be provided with a notch, a, either filed or cast in at equal distance, about four inches from the bearings s. D and D are the core-barrels. They may be a little shorter than the flask, as will be seen in the drawing. They should be well fitted in the bearings sin the nowel B, while they may fit more loosely in the cope A; and when the flask is closed the cores D and D may be held down by a nail being wedged between the core-barrels I) and D and the bearings s in the cope A, a notch being filed in the bearings for admitting the nail. F is a compress, comprising the inclined bearings c and c and the thumb-screw d. This compress is used where two smallpipes are cast in one flask. F is a compress to be used where one pipe is cast in a flask, as will be seen in Figs. 1 and 4. E is a rest for the thumb-screw of compress F, either of wrought or cast-iron, with a small rib, b, on

each end to match the notch a when laid across the handles 0, Figs. 1, 2, and 3. Where two pipes are cast in one flask, and the iron is poured between the pipes, the cores D and D arepressed outward as well as upward, the compress F being hung between the core-barrels D and D, (Fig. 3, Fig. 2, and Fig. 1, left end,) so that the incline c rests under core-barrel D, and incline c rests underv the core-barrel D, and the thumbscrew d rests on the rest E, and being lightly screwed down, the cores D and D will be sprung inward and downward, and so the upward and outward pressure caused by the iron ,is balanced, the cores are held in the center of the mold, and straight pipes of even thickness of iron, and without chaplets, are obtained. Where one pipe is made in a flask, and the iron is poured from two sides there is only a pressure upward; the compress F being hung with its bearing 0 under the core-barrel D, and the thumb-screw d resting on the single handle 0, and a nail or wedge, 00, being inserted between the core-barrel and the handle 0 for the purpose of holding the core in its place so that it cannot lift up when the thumb-screw d is screwed downward, the nail or wedge .10 being transverse between the core-barrel and the handle, and causes the core to spring downward when the screw (1 of the compress F is screwed down. Thus the pressure of the iron is balanced and the core is held in the center of the mold, and pipes straighter and of even thickness of iron are obtained.

1 claim as my invention The compress F, having inclined bearings c.

and 0, bars E, and set-screw d, in combination with the handles of a flask, as and for the purpose described.

CHARLES J. G. PETERSEN. Witnesses:

FERDINAND Mnrzenn, ERNEST T. W. GRUBE. 

